Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark Alan Fritsch, MD
Anatomic Pathology & Clinical Pathology Physician in Olympia Fields, IL · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1467445361
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 100387880 | Medicaid | IN | — |
| 3720784008 | Other | IN | CIGNA |
| 82420 | Other | IN | BCBS |
| 351173213 | Other | IN | HFN |
| 351173213 | Other | IN | ISPAT INLAND |
| 01630255 | Other | IL | BCBC |
| 220018690 | Other | IN | RR MEDICARE |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty.
Frequently asked questions
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-23.